SV650.org - SV650 & Gladius 650 Forum - View Single Post

Bibio · 20-07-18, 02:40 PM

first off its an expansion tank not a rez. when the coolant gets to a certain temperature the radiator cap opens up (thermostatic valve) to allow coolant to flow into the expansion tank. when the coolant cools down there is a bleed hole in the radiator cap to allow the coolant to drain back into the radiator. any excess coolant in the expansion tank will overflow out. this is fine and you should not top your expansion tank up afterwords as its now at the correct level.

its America its hotter ambient temps than here in the UK. due to this its very very rare that your fan will kick in. to test your fan let the bike tick over till the system is 102+deg at which point the fan should kick in. the only time my fan kicks in is when i'm balancing the TB's as the bike needs to get up to 84deg before you can shut the auto idle valve off as its a twin spark so you have a small window of time to do the job before the fan kicks in and the SDS tool turn the valve back on.

20-07-18, 02:40 PM	#4
Bibio Member Mega Poster Join Date: Jul 2008 Location: here as devil's advocate Posts: 11,540	Re: Cooling fan first off its an expansion tank not a rez. when the coolant gets to a certain temperature the radiator cap opens up (thermostatic valve) to allow coolant to flow into the expansion tank. when the coolant cools down there is a bleed hole in the radiator cap to allow the coolant to drain back into the radiator. any excess coolant in the expansion tank will overflow out. this is fine and you should not top your expansion tank up afterwords as its now at the correct level. its America its hotter ambient temps than here in the UK. due to this its very very rare that your fan will kick in. to test your fan let the bike tick over till the system is 102+deg at which point the fan should kick in. the only time my fan kicks in is when i'm balancing the TB's as the bike needs to get up to 84deg before you can shut the auto idle valve off as its a twin spark so you have a small window of time to do the job before the fan kicks in and the SDS tool turn the valve back on.